Internal combustion engine



Oct. 1, 1940. s, GRANTZ ETAL INTERNAL COIBUSTION ENGII IE Original Filed July 2o, 10:;

@ma/W cylinder engine adapted for fuel injection and Patented Oct. 1, 1940 INTERNAL COMBUSTION ENGINE Siegfried Grantz and Werner Lindner, Augsburg,

Germany, assignors to Maschinenfabrik Augsburg-Niirnberg A. G., Augsburg, Germany, a corporation of Germany Application July 20, 1938, Serial No. 220,256. Re-

iiggved March 28, 1940. In Germany August 12,

UNITED STATE 3 Claims.

This invention relates to internal combustion engines.

One object of the invention is the provision of an internal combustion engine having an exhaust chamber in communication with the several engine cylinders and mounted closely adjacent and around the combustion spaces and the cylinder walls and in direct communication with the combustion spaces, the combustion chamber being of such size and arrangement as to prevent substantial reduction in the speed of operation or substantial increase in the rate of fuel consumption. engine may come from an air supply chamber ar- Another object of the invention is the provision ranged below the exhaust chamber 3 through inof an internal combustion engine having a series clined air supply passages 9 as shown in Figs. of engine cylinders and having a common exhaust 1 and 2. chamber of substantial capacity arranged so as In accordance with the construction illustrated to entirely surround all of the engine cylinders in Fig. 2, the exhaust chamber 3 is formed as an and in direct communication with the combustion integral part of the engine frame, the frame spaces of the cylinders. being extended upwardly to surround the cylinder Other objects and advantages will be apparent walls up to the cylinder heads 6. The arrangeextends up substantially to the cylinder head. The chamber 3 extends around or envelops the cylinder walls of all the cylinders, the outer annular surfaces of the cylinder walls being entirely surrounded by the exhaust gases. The chamber 3 reaches around the end cylinders of the series and terminates at one end in a joint or flanged portion 8 that is adapted for communication to a common exhaust pipe which leads to a suitable exhaust receptacle.

The scavenging and charging air supply to the from the following description, the appended ment of the exhaust chamber around the end claims, and the accompanying drawing, in which,

Fig. l is a vertical sectional view of an internal combustion engine embodying the present invention;

Fig. 2 is a vertical sectional view ofan engine, showing a somewhat modified frame arrangement; and

Fig. 3 is a top plan view of a multi-cylinder cylinders is the same as in the construction shown in Fig. 3.

Since the exhaust receiving chamber 3 is in direct communication with the several engine cylinders and is of unusually large size and capacity, the combustion engine is practically indewhich the exhaust gases are supplied after leaving engine showing the relationship of the exhaust the exhaust chamber 3, and the speed of operachamber with respect to the engine cylinders. tion; of the engine is not adversely aifected while Referring more p a y to e d w y the fuel consumption is maintained at an efficient reference numerals, 5 designates the Cy de value. Since the exhaust chamber 3 envelops the supporting portion of the frame of an internal cylinder walls this space is utilized without incombustion engine, herein shown as a multicreasing the height or width of the engine, leaving the space along the sides of the engine below the cylinder walls available to accommddate such apparatus as the blower, fuel pump and other auxiliary devices. The exhaust chamber 3. moreover forms a nicely. finished smooth upward conarranged to exhaust the burned gases through exhaust channels I in the side walls of the engine cylinders. These exhaust channels l are made very short in length and lead the exhaust gases into the exhaust collecting chamber 3 which is tinuation of the sides of the engine and also has defined in part by a wall 4 and in part by the outer a more efi'ectivemuffling action on the sound than Surface of the Cylinder W1111S,Whi.0h e p r b y is obtained in conventional exhaust pipes which water-cooled. conduct the exhaust in the conventional manner The Wa l p ion 4 0 the ex aust C mber as from the engine cylinders to the common muffler. Shown in 1 is a p e p Sea d upo t a The invention is especially adaptable for engines frame 5, 50 that the pp part of the cylinder of the medium and smaller sizes, which are afsupporting portion of the frame defines the botfected to greater extent than the large size entom of the exhaust chamber 3. gines bythe size of the exhaust passages which The common exhaust chamber with which all of extend from the engine cylinders. the combustion spaces of the cylinders communifound that a decrease of about 25% in the size cate is of large capacity, the height of the chamof the exhaust receptacle to which the exhausts her being preferably of the order of the heightare conducted after leaving the exhaust chamber of the combustion chamber, it being apparent '3 has had no substantial effect on the fuel conpendent of the size of the exhaust receptacle tofrom Figs. 1 and 2 that the exhaust chamber 3 60 It has been sumption of the engine or on the power output of the engine.

While the form of apparatus herein described constitutes a preferred embodiment of the invention, it is to be understood that the invention is not limited to this precise form of apparatus, and that changes may be made therein without departing from the scope of the invention which is defined in the appended claims.

What is claimed is:

1. In an internal combustion engine, a series of engine cylinders having cylinder walls and pistons operable therein, means supporting said cylinder walls, an exhaust chamber for receiving the exhaust gases directly from said engine cylinders and extending along the sides of said cylinder walls and enveloping portions thereof, said chamber extending in a zone laterally adjacent the combustion spaces of the cylinders throughout substantially the entire height of the combustion spaces.

2. In an internal combustion engine, a series of engine cylinders having cylinder walls and pistons operable therein, means supporting said cylinder walls, an exhaust chamber ior receiving the exhaust gases directly from said engine cylinders and extending around and enveloping the sides of said cylinder walls and reaching from exhaust passages in the cylinder walls to the cylinder heads, said cylinder walls having exhaust passages remote from the cylinder heads placing said exhaust chamber in direct communication with the combustion chambers of the cylinders.

3. In an internal combustion engine, a series of engine cylinders having cylinder walls and.

SIEGFRIED GRANTZ. WERNER LINDNER. 

